Plant Parasites of Europe

leafminers, galls and fungi

Isocolus fitchi

Isocolus fitchi (Kieffer, 1898)

on Centaurea


Rotund, unilocular, hard or fleshy swelling of 4-8 mm in the lower part of the stem, or the petiole or midrib of a ground leaf. Not infrequently several galles together, and then sometimes partially fused. Univoltine, pupation and hibernation in the gall.

host plants

Asteraceae, narrowly monophagous

Centaurea scabiosa.


Aulax fitchi.


According to Buhr the galls only occur in the stems.


Buhr (1964a), Dauphin & Aniotsbehere (1997a), Eady & Quinlan (1963a), Houard (1909a), Melika (2006a), Nieves-Aldrey (1984a, 2001a), Nieves-Aldrey & Askew (2002a), Redfern & Shirley (2011a), Tavares (1905a [“Aulax fichti”]), Tomasi (2014a).

Last modified 20.iii.2021